Apparatus for winding electrical coils



Oct. 2, 1951 J. B. LEECE ET AL APPARATUS FQR WINDING ELECTRICAL COILS 9Sheets-Sheet 1 Filed NOV. 2'7, 1948 m r T.

INVENTORS JbH/Y 5. ZEECE y harm/v R fl-M'Mwv MHZ 2M 5 Array/ways Oct. 2,1951 J. B. LEECE EI'AL 2,559,679

APPARATUS FOR WINDING ELECTRICAL COILS I Filed Nov. 27, 1948 9Sheets-Sheet 2 IN VEN TORS Jar/1v B. (Essa Mum/v RflmMa/v Oct. 2, 1951J. B. LEECE EI'AL APPARATUS FOR WINDING ELECTRICAL COILS 9 Sheets-Sheet5 Filed Nov. 27, 1948 .JulIIlll INVENTORS Jo/m 8.15am: By M47714 fi/lwaw Oct. 2, 1951 j B LEECE ETAL 2,569,679

APPARATUS FOR WINDING ELECTRICAL COILS Filed Nov. 27, 1948 '9Sheets-Sheet 4 Jbmv 6. LEECE BY 0277/4 fi/mww/ M092 I Lg 14 we e-ya 1951J. B. LEECE ETAL 2,569,679

APPARATUS FOR WINDING ELECTRICAL cons Filed Nov. 27, 1948 A 9Sheets-Sheet 5 Arm IVE-)5 Oct. 2, 1951 J. B. LEECE ETAL 2,569,679

APPARATUS FOR WINDING ELECTRICAL COILS Arromvays' 2, 1951 J. B. LEECEETAL 2,569,679

APPARATUS FOR WINDING ELECTRICAL cons Filed Nbv. 27. 1948 9Sheet.sSheet'7 Arromvm 1951 J. B. ITEECE ETAL 2,569,679

APPARATUS FOR WINDING ELECTRICAL COILS Filed Nov. 27, 1948 9Sheets-Sheet s INVENTORS Jmv 61 Asses By Mum/v fiMM/vwv Jrroqdsys Oct.2, 1951 J. B. LEECE ETAL APPARATUS FOR WINDING ELECTRICAL COILS 9Sheets-Sheet 9 Filed Nov. 27, 1948 MW,M8

Patented Oct. 2, 1951 APPARATUS FOR WINDING ELECTRICAL COILS John B.Leece, University Heights, and Nathan P. Harmon, Cleveland, Ohio,assignors to The Leece-Neville Company, Cleveland, Ohio, a corporationof Ohio Application November 27, 1948, Serial N 0. 62,394

11 Claims.

This invention relates to the winding of wire into electrical coils and,more particularly, to a novel apparatus for winding a wire coil in placeon a core member.

An object of the present invention is to provide a novel apparatus bywhich a wire coil can be wound on a core member in a more rapid andsatisfactory manner than has been possible heretofore.

Another object of the invention is to provide a novel apparatus by whicha wire coil, such as afield coil, can be wound on an internal poleprojection or the like of a hollow magnet frame in a more rapid andsatisfactory manner than has been possible heretofore. V

A further object is to provide a novel coil winding apparatus in which arelative reciproeating movement and a relative oscillatin movement areproduced in timed relation between a workholder carrying a core memberand a wirefeeding guide for winding the wire around the core member.

Still another object is to provide a, novel coil winding apparatus foruse with a core member having an opening therein and a pole elementprojecting into such opening and in which the relative reciprocating andrelative oscillating movements cause the wire-feeding guide to passthrough said opening and wind the wire around the pole element.

As another of its objects this invention provides novel apparatus forwinding a coil on a core member in which a workholder for the coremember is reciprocably movable and a wire-feeding guide is adapted foroscillation transversely to the path of the reciprocable movement and intimed relation thereto.

Yet another. object is to provide novel coil winding apparatus of thecharacter mentioned, in which the wire-feeding guide is an arm carriedby a stem which is rockable about an axis extending substantially in thedirection of the reciprocating movement of the workholder.

Still another object is to provide a coil winding apparatus of thischaracter in which the workholder is adapted to receive a magnet framehaving an opening therein and a pole member extending into such opening,and the reciprocating movement of the workholder causes the wirefeedinguide to pass through the frame opening and the oscillation of the guidetransversely of, and in timed relation to, the reciprocating movementcauses the wire to be wound around the pole member. y

it is also an object of this invention to provide coil winding apparatusof the character mentioned in which the workholder comprises sectionswhich are relatively movable for holding or releasing the Work and thereciprocating movement of the workholder is toward and away from aloading and unloading station and in which. actuating means at saidstation is adapted to be rendered effective on the workholderforreleasing the Work.

As a further object this invention provides apparatus for winding coilson a pair of internal pole members which are spaced apart a givenangular distance in a hollow magnet frame by causing relativereciprocating and relative oscillatin movement between the magnet frameand a wire-feeding guide having wire-feeding arms spaced apart saidgiven angular distances such that the guide passes through the frameopening and the arms thereof travel around the pole members for windingthe coils thereon.

Other objects and advantages of the invention will be apparent in thefollowing detailed description and in the accompanying sheets ofdrawings in which:

Fig. l is a front elevation of a coil winding machine embodyin thepresent invention;

Fig. 2 is a plan view of the machine;

Fig. 3 is an elevation of the right-hand end of the machine;

Fig. 4 is a partial vertical section taken substantially on section line44 of Fig. 2 and showing certain mechanism of the machine on a largerscale;

Fig. 5 is a partial horizontal section taken substantially on sectionline 55 of Figs. 1 and 4, and. showing the main drive shaft andassociated mechanism of the machine on a larger scale;

Fig. 6 is a partial vertical section taken on section line 6-6 of Figs.1, 2 and 4;

Fig. '7 is a fragmentary vertical section taken substantially asindicated by section line 1-1 of Fig. .2 but with the workholder at theloading and unloading station at the upper end of its reciprocatingtravel;

Fig. 8 is a similar fragmentary vertical section but showing theworkholder in an expanded condition for releasing the work;

Fig.9 is a fragmentary horizontal section taken substantially on sectionline 9-9 of Figs. 3 and 6 and further illustrating the mechanism forcausing the oscillating movement of the wirefeeding guide;

Fig. 10 is a partial vertical section taken through the guideoscillating mechanism, as indicated by section line l0|0 of Fig. 9; V

Fig. 11 is a fragmentary plan view of the workholder when locatedSubstantiaHy at the upper end of its travel and viewed as indicated byline of Fig. '7 and with a magnet frame therein having pole members onwhich field coils are being wound;

Fig. 12 is a fragmentary front elevation corresponding with a portion ofFig. 4 and presenting a larger scale showing of the brake energizingswitch and the means for actuating .the same from the clutch controlshaft;

Fig. 13 is a Vertical section takenthrough one of the wire tensioningdevices as indicated by section line l3l3 of Fig. e n

Fig. 14 is a sectional detail View taken through a detent device asindicated by section line |4-|4 of Fig. 6; I

Fig. 15 is a fragmentary detail view partly in vertical section furtherillustrating the upper end portion of the wire-feeding guide;

Fig. 16 is a, plan View showing, as an example of a workpiece, alaminated motor frame having field coils whichhave been wound in placetherein by the method and apparatus of this invention; and

Fig. 17 is a side elevation ofsuch motor frame.

The accompanying drawings show oneembodiment of the improved coilwinding machine It] which will now be described in greater detail. Theimproved machine is provided with a suitable frame H on which thevarious parts are mounted. The frame I may comprise an upright structureformed principall of metal bars, such as angle irons, and having pairsof upright legs l2 and -|3 at the right and left ends thereof. The framealso includes a plurality of substantially horizontally extending platemembers l4, |5, I6 and H located t different elevations and on whichvarious parts of the apparatus are mounted, as explained ingreaterdetail hereinafter.

In addition to the frame H the improved machine 0 comprises, in general,a maindrive shaft I8, 2. reciprocably movable workholder l9 and anoscillating wire-feeding guide 20. A workpiece 2| is shown in place inthe workholder 9 in Figs. 7, 8 and 11 and,before proceeding further withthe detailed descriptionof the machine, it is considered advisable tobriefly describe the workpiece on which the coil winding operations areto be performed.

The workpiece 2| "is here shown (Figs. 16 and 1"?) as being acorememberfor an electromagnet and, although the machine is adaptable tocoil winding operations on various forms of core members, the workpieceshown in this instance is a laminated frame for a small electric motor.The workpiece 2| can be further described as being a hollow magnet framehaving an opening 22 extending therethrough and into which a pair ofopposed pole members '23 and 24 project. The pole members 23 and 24,which in this instance are the field poles of the electric motor, areintegral portions of the magnet frame and have concave pole faces 23aand 24a located on diametrically opposite sides of :the opening 22 andbetween which an armature or the like is adapted to be rotatablyreceived. The pole members 23 and 24 extend for the full height orthickness of the stack of laminations constituting the frame 2| and havepoletips 23b and 24b thereon at opposite sides thereof. The raised poletips 23b and 24b are spaced apart by intervening spaces or slots 22a and221) which communicate with the frame opening 22 at its opposite sidesas seen in Fig. 16. Thezpole'members 2'3 and 2'4 have undercut recesses23c and 240 extending thereacross and located adjacent the pole tips 23band 24b so that the tips of each pole form a pair of hook-like portionsbehind which the field coils can be wound.

The magnet frame 2| is shown :in Figs. 16 and 137 as having field :coils25 and '26 #thereon in surrounding relation to the poles 23 and 24. Thefield coils 25 and 26 have been wound in place on the .poles .23 and 24by the improved machine I0 and the method accomplished thereby. Thesefield coils extend around the poles so as to lie in the undercutrecesses 23c and 240 and are retained in place by the pairs of hook-likepole tips 231) and 24b. "The opposite ends of the coil 25 extend"outwardly therefrom in the form of the wire leads 25a and 25b and,similarly, wire leads 26a and 26b extend outwardly from opposite ends 4of the coil 26.

At the conclusion of the coil winding operation performed by the machineill, the coils 25 and 26 extend around the poles 23 and 24insubstantially the position shown in Fig. '16 and may overlap to someextent the pole faces 23a and 24a which define the arcuate sides of theframe opening 22. This is immaterial, however, because these coils aresubjected to -a subsequent forming operation by which they will becurved outwardly-away from the opening 22 so that an armature can bemounted in the latter. As :here shown, the workpiece 2| mayialsozhave 1a,epair of substantially flat outer side faces 21 thereon and a pair ofconvexly curved outer side faces 28 with which certain portions of theworkholder |:9 cooperate :as will be presently explained.

The workholder 1:9 is :of a sectional construction and includes a hollowmetal body 30 having a :pair of upright integral arcuate front and backwalls 3| and 32 between which the workpiece 2| is received, asshown-inFig. 11. The front and back walls 13| and 32 are provided at theinside thereof with hardened arcuate inserts 31a and 320. which areengaged by the convex outer side faces 22.8 of the workpiece. Theworkholder |-9 also includes a pair of side plates 33 and .34 -locatedin inwardly facing =.opposed relation and attached to edge portions ofthe front and 'back walls =31 and 52 by-means of screws 35. The innerfaces 33a and 34a of these side plates form the side Walls of the cavity30a of the Workholder and are engaged by the diet outer side faces 2:!of the workpiece 2|.

Each .of the side plates-33kand 34 alsocarries-a pair of inwardlyprojecting lugs'or shoulders :36 forming .rests :for supporting theworkpiece 2|. These inwardly projecting-shoulders 56 form four suchrests disposed in a substantially quadrangular-plan relation, as'shownin Fig. .11, and support the workpiece :at four correspondingly.locatedmoints. .;'-I'he .uprightfrontand rear arcuate walls 3| .and 32of the workholder I19 --are also provided with recesses (Nb and :32bextending downwardly'thereinto from the tops :thereof and which formclearance recesses for the fingers of a person operating-themachine.'Theseclearance recesses I 3 b and 3% permit the operators' fingers tograsp the workpiecerat substantially diametrically opposed-points forremovingthe same from the workholder after -the=coils 25 and '26 havebeen wound thereon. Each :of the side plates :33 and "34 is .furtherprovideid with :a :pair :of .vertically Fspaced substantially la'terallyextending slots :31 and F38 see Fig. 7) which communicate with th cavity30a of the workholder.

The worlrholder -49 also includes 'a pair-"of 5.". fork members 39 and49 which are associated with the respective side p1ates'33 and 34. Eachof these fork members has a pair of vertically spaced arms 4| and 42which extend inwardly through the paired slots 31 and 38. The pairs ofslots 31 and 38 are so located in the side plates 33 and 34 with respectto the shoulders 36 that' the arms 4| and 42 of the fork members 39 and40 will straddle the workpiece 2|, as shown in Figs. 7 and 11. The forkmembers thus constitute holding or looking members which retain theworkpiece 2| in the cavity 30a of the workholder I9.

The fork members 39 and 40 are normally urged in an inward direction bycompression springs 43 so as to extend the arms 4| and42 into the cavityof th workholder simultaneously and from opposite sides thereof. Thesprings 43 are here shown as being mounted on screws which are carriedby the side plates 33 and 34 and extend through openings provided in thefork members 39 and 49. The springs 43 have their outer ends inengagement with the heads of the screws 44 and their inner ends pressingagainst spring seats formed by the bottoms of recesses 45 which extendinto the fork member. The fork members 39 and 49 are movablesubstantially radially of the workholder I9 and when they have beenexpanded outwardly to substantially the position shown in Fig. 8, thearms 4| and 42 thereof will have been withdrawn from the workholdercavity 39a and the workpiece 2| is then free to be lifted out of theworkholder by the operator.

To provid for such outward movement of the fork members 39 and 40 inopposition to the springs 43, these members are constructed withkey-shaped projections or heads 39a and 40a. thereon at their outerends, as shown in Fig. 11, and with which a pair of actuators 41 and 48are adapted to cooperate. The actuators 41 and 48 have dovetail slots41a and 48a. therein in which the heads 39a and 40a of the fork members39 and 4|! engage to provide an operating connection between theactuators and the fork members. When this operating connection has beenestablished in the manner explained hereinafter and as shown in Figs. 7,8 and 11, the actuators 41 and 48 can apply an outward pulling force tothe fork members 39 and 40 for retracting the same to their workreleasing position shown in Fig. 8.

As indicated above in a general way, the workholder I9 is reciprocablymovable during the coil winding operation and carries the workpiece 2|with it during such reciprocating movement. In the apparatus hereindisclosed the reciprocating movement of the workholder I9 is a verticalreciprocating movement and during this reciprocating movement is guidedby a fixed upright guide rod 50. For cooperation with th guide rod 50the body 30 of the workholder is provided with a laterally extending armhaving a bushing 5Ia therein which is slidable on the guide rod. Theworkholder I9 is also supported and guided in part by an uprightcylindrical stem 52 which constitutes a part of the wire-feeding guid 20to be described hereinafter. The body 30 of the workholder has a bushing53 mounted therein and which is slidable on the upright stem 52. Forimparting the above-mentioned vertical reciprocating movement to theworkholder I9, the body 39 thereof is provided with a rack 55 with whicha driving gear 56 meshes. I

It can well be explained at this point that the body 390i the workholderI9 is'p'rovided with a 6.. clearance chamber 54which accommodates thewire-feeding guide 20 at certain time during the winding operation aswill be explained hereinafter. The clearance chamber 54 islocated belowthe work supporting shoulders 36 and constitutes a downward continuationof the cavity 300 of the workholder.

The wire-feeding guide 20 comprises the above mentioned vertical stem 52and a pair of hollow guide arms 5'! and 58 mounted thereon adjacent itsupper end and extending in substantially di ametrically opposedlaterally projecting relation, as shown in Figs. 6 and 11. The stem 52has a central passage 59 therein through which a pair of wires 60 and 6|are adapted to be supplied to the guide arms 5'! and 58 for feeding bythe latter to the pole members 23 and 24 of the workpiece 2| during thewinding of the coils 25 and 26 thereon. The arms 51 and 53 are suitablymounted on the stem 52 so that their passages 51a and 58a willcommunicate with the central passage 59 to receive the wires 5!) and SItherefrom.

In the embodiment of the invention here illustrated the hollow guidearms 57 and 58 are mounted on the stem 52 by having block-shaped baseportions 52a engaged in side openings of the stem and retained thereinby the setscrew 62. At the outer end thereof each of the guide arms 51and 58 is provided with a substantially belllshaped head 63 having anoutwardly flared recess 63a therein. The recesses 63a constitute theouter 7 ends of the wire-feeding passages 51a and 58a.

The portions of the arm 51 and 58 extending between their block shapedbases 52a and their bellshaped heads 63 constitute necks 51b and 58b ofrelatively reduced size through which the passages 51a and'58a extend.

The wire-feeding guide 20 is adapted for oscillating movement which isimparted thereto in timed relation to the vertical reciprocating movement of the workholder I9. For this purpose the upright stem 52 issupported by and journalled in an upright bearing sleeve 65. The bearingsleeve 65 is mounted on the plate I6 of the frame II and, as shown inFigs. 3, 4 and 6, extends through this plate and is connected thereto bythe welding 66. The lower portion of the stem 52 is mounted in thebearing sleeve 65 by the vertically spaced anti-friction bearings 61 and68 (see Fig, 6). The lower end of the stem 52 is provided with a recessin which a guide bushing 69 is mounted. This bushing has guide passagestherein through which the wires 6|] and GI extend. The abovementionedfixed guide rod 59 has its lower end secured in an arm 65a of thebearing sleeve 65 as by means of the setscrew 65b and has its upper endengaged in an opening Ila of the plate I'I.

During the coil winding operation, vertical reciprocating movement isimparted to the workholder I9 by the gear 56, as mentioned above, andduring this movement the workholder moves relative to the wire-feedingguide 23 so that the latter passes relatively through the opening 22 ofthe workpiece in the manner of a needle during a sewing operation.During this relative passage of the wire-feeding guide 23 through theopening of the workpiece, the wire-feeding arms 51 and 58 functionsomewhat in the manner of the eye of the needle since they carry thewires 60 and GI back and forth during the winding thereof around thepole members 23 and 24. In order to have the arms 51 and 58 of the guide20 move through the opening 22 of the workpiece 2|, these arms mustberelatively short as shown in Fig. 11, and

- the'reduced necks5lb' and 58b thereof should be 7 only long enough tolocate the bell-shaped heads 63 generally outwardly of the pairs of poletips 23b and 24b.

The oscillating movement. of the; wire-feeding. guide constitutes a backand forth rotary or rocking movement of the stem 52. in the bearings 61and 58 which causes an arcuateback and forth swinging movement of thewire-feeding arms. 51 and 58 transversely to the direction of thereciprocating travel of the workholder I9. The rocking movement isimparted to the stem' 52 by means of a gear 70 keyed thereto and. a gearsector II meshing therewith. The oscillating movement. of thewire-feeding guide 20 is imparted thereto: at the ends of thereciprocating travel of the workholder I9 and only while the workholder;is stationary at the ends of such reciprocating travel. Similarly, thereciprocating movement of the workholder I9 is imparted thereto at theends of the oscillating movement of the wire-feeding, guide and onlywhile the guide is in its stationary position with the wire-feeding arms51 and, 58 located in a position to pass through the slots 22a and 23abetween thepairs of pole tips 231) and 24b.

Fig. 6 shows the workholder E9 in its lowermost position and also showsthe corresponding position for the wire-feeding guide 20 and at thistime thestem 52 thereof extends through the workholder and. wire-feedingarms 51 and58 are located above the upper end of the workholder. Whenthe workholder is moved upwardly by the gear 56 the wire-feeding arms 51and 58 travel relatively downwardly through the workpiece and bythe timethat the workholder has reached the end of: its. upward travel, the arms5'! and 58- will have moved into the clearance chamber 54 of the body ofthe workholder. The oscillating movement which is imparted. to thewire-feeding guide 20 at the end of the upward travel of the workholdercauses a lateral arcuate swinging of the arms 51 and 58 intheclearancechamber 54.

For supplying the motion needed to actuate the workholder I9 and thewire-feeding guide 20 with the above-mentioned reciprocating andoscillating movements, the machine It is provided with the previouslymentioned main drive shaft I8. This drive shaft is journalled in aplurality of aligned bearings i2, 73 and I4 (see Fig. 5-) which aremounted on the plate I5 of the frame II. A portion of the drive shaft I8extends beyond the bearing I2 and has a crank or eccentric I5 keyedthereon. The crank 15 carries a crankpin I6 from which the gear 56. isadaptedtobe oscillated by means of a connecting link H. The lower end ofthis link is pivotally connected with the crankpin I6 by means of a linkportion ":8 having a slot 18a therein in which the crank pin engages.The purpose of the slot 1.8a will be explained hereinafter.

The upper end of the link TI is pivotally connected with the gear 56 bythe pivot pin 5,9 of the latter. The gear 56 is mounted on and keyed toan auxiliary shaft which extends in a lateral direction and is locatedadjacent the underside of the plate IT. The auxiliary shaft 80 is.journalled in suitable bearings SI and 82, of' which the bearing 82 issecured to the right-hand end of the frame II, and the bearing BI ismounted on the underside of the plate I! in depending relation thereto.A handwheel 86a is mounted in fixed relation on the outer end of theshaft 85 and serves a purpose which will be subsequently explainedherein.

At a point between the bearings "I2 and"|3 the;

- riesa crankpin 92.

mainishaft, I8 has a bevel. gear 84: mounted thereon' and keyed thereto.A bevel gear 85. meshing with, the gear 84. is keyed to a vertical shaft36 which is mounted inan upright bearing sleeve 81'. The bearingsleeveis mounted on the plate I6. so as to extend through an opening thereofand can be attached to the plate by the welding indicated at 88. Theupright shaft 86 is journalled in the bearing sleeve 81 by means of theantifriction bearings 89 and 9B.

The oscillating. movement for the wire-feeding guide 20 is obtained fromthe vertical shaft 86 and for this purpose a crank or eccentric BI ismountedon the upper end of this shaft and car- The gear section TI isoperably connected with the crankpin 92 by a link 93. One-end of thelink 93 is pivoted on the crankpin 92 and its other end is provided witha slot 94 and is connected with the gear sector "II by means of av pivotpin 95 which is carried by the gear sector and engages in this slot. Thepurpose of the slot 94 will be explained hereinafter. The gear sector IIis adapted for swinging movement by being mounted on apivot shaft .36which is fixed in the upper end of an upright post 97. The post 91 issuitably mounted on the plate I6 as by means of the welding indicated at98.

The main drive shaft I8 can be driven from an electric motor 99 througha reduction gear I00. The motor and reduction gear are suitably mountedon the plate I4 of the frame iI. The output shaft of the reduction gearI80 has a pulley IIlI there-on with which a pulley H32 of the driveshaft I8 is connected by means of a belt I83 extending around thesepulleys. The electric motor 99 operates continuously when energized byclosing a motor control switch Hi l. This switch can be mounted on theframe II at any suitable-point and includes a starting button IS la anda stop button Ifidb. The pulley I32 is adapted to be drivingly connectedwith the shaft I8 by means of a conventional clutch, such as the diskclutch I95 here shown.

The clutch I05 includes a clutch sleeve I06 which is mounted on theshaft i8 and shiftable axially thereof by means of a clutch actuatinglever IIJL One end of the lever I0? is mounted on afixed pivot I08 andthe other end thereof is adapted to be swung axially of the shaft I8 bya lever I09 which transmits such swinging movement to the clutch leverfrom a clutch actuating shaft H0. The lever I09. is mounted on a fixedpivot I I I andhas its opposite ends pivotally connected with the clutchlever I01 and the clutch actuating shaft II!) respectively, by the pivotpins II2 and H3. The clutch actuating shaft III! is mounted for axialsliding movement in a pair. of spaced bearings II 4 and H5 which,. inturn, are mounted on the plate I5.

Clutch actuating movement is imparted to the shaft III) in one directionby a solenoid IIS andin the opposite direction by a compression springIll. The solenoid II6 is mounted on the plate I5 and has an armature II8 movable therein and V with which one end of the clutch actuatingshaft II'O is connected. The spring II: is located on the shaft III) ata point between the hearing I I4 and the. adj ajcent end of the armatureI I8 of the solenoid II6. When the solenoid H6 is energized the armatureI I8 thereof is shifted to the position shown in Figs. 2, 4' and 5,thereby causing the lever I09 to swing the clutch lever IO'I toward theleft and shift the clutch sleeve I06 in a direction to engage the clutchI05 and cause the shaft I8 to bedriven. When the solenoid II'6 isvdeenergized the spring I I I shifts the armature I I8 in the oppositedirection and causes the clutch lever I01 to disengage the clutch I05.

When the solenoid I I6 has been deenergized to cause disengagement ofthe clutch I65, it is desirable to quickly bring the drive shaft I8 andthe parts of the winding mechanism connected therewith to a stop. Forthis purpose the machine It is provided with an electromagnetic brakeI29 of a conventional form. This brake is mounted on the plate I andcooperates with the shaft I8 through suitable friction means to causestopping thereof when the brake is electrically energized. Energizationof the brake in timed relation to disengagement of the clutch I05 isaccomplished by the closing of a brake energizing switch I2! (see Figs.4 and 12). Y

The switch I 2| is located adjacent the clutch control shaft H0 and isadapted to be closed by the action of a trigger or latch I22 carried bythis shaft. The switch I2I is normally open but is adapted to be closedby downward movement of a resilient arm I23 which carries a roller I24.The trigger I22 is located in a slot I25 of the clutch control shaft II0 and is pivotally connected with this shaft by means of a transversepivot pin I26. The shape of the trigger I22 and of the slot I25 are suchthat during movement of the clutch control shaft IIO toward the left bythe spring I", the trigger will be effective to cause the closin of theswitchI2I, but during movement of the shaft toward the right byenergization of the solenoid II6, the trigger will swing idly on thepivot pin I26 and will move over the roller I24 without causing closingof the switch.

In order to accomplish the functioning just explained for the trigger I22, it will be observed that the trigger has an inclined portion I2!which engages the roller I24 during the return or righthand movement ofthe shaft H0 and causes the above-mentioned idle swinging of thetrigger. The trigger also has an inclined face I28 which engages theroller during movement of the shaft toward the left and since the shapeof the slot prevents any idle movement of the trigger during theshifting of the shaft in this direction, the" face I28 will transmitthrust to the roller I24and will cause downward springin of theresilient arm I23 to close the switch I2 I.

The trigger I 22 is also provided with a fiat surface I29 over which theroller I24 must pass during the clutch disengaging movement of the shaft0 toward the left. The passage of the roller over the surface I29 occursimmediately following the closing of the brake energizing switch I2I bythe inclined surface I28. The surface I29 constitutes a dwell portion ofthe trigger which holds the switch I2I closed for a short interval of,time so as to maintainthe brakin action of the electromagnetic brake I20effective on the shaft I8 for this time interval. As soon as the rollerI24 traverses the dwell surface I29 and moves upthe inclined surfaceI21, the switch IZI will open to deenergize the electromagnetic brakeI20. 7

The machine I0 includes mechanism for controlling the coil windingoperation and an important part of this' controlmechanism is representedby the combinedrevolution counter and control switch device I30 which ishereinafter referred to merely as a revolution counter. This deviceserves to count the number of turns of wire which are being Wound aroundthe pole members 23 and 24 in forming the coils 25 and 26 and to causean automatic stopping of the machine when the desired number of turnshas been wound on. the. p l members. The revolution includes apush-button switch J counter I30 is here shown as being connected withI4. The counter I30 can be suitably supported as by being mounted on abracket or plate I 3| projecting laterally from the frame II.

The revolution counter I30 is a conventional form of combined revolutioncounter and electric switch device and embodies mechanism which isadapted to be set for the desired number of turns to be wound in thecoils 25 and 26 as by means of a manually adjustable knob I32. Thecounter also includes electric switch mechanism for energizing thesolenoid I I6 and for automatically deenergizing this solenoid when thedesired number of turns has been wound into the coils 25 and 26.

The control mechanism of the machine I 0 also I33 which is mounted in asuitable location, such aS on one of the legs I2 and at the front of themachine, and which is electrically connected with the revolution counterI30. The winding operation is started by the operator pressing thepush-button of the switch I33 to thereby energize the revolution counterI30 and render the same effective to count the turns of the coils to bewound and also causing the counter to close the energizing circuit forthe solenoid II6 for engaging the clutch I05. The operator can thenrelease the button of the switch I33 since the solenoid I I6 will bemaintained energized until the desired number of turns has been wound toform the coils 25 and 26. When the number of turns in the coils reachesthe value for which the counter I30 has been set, the counterautomatically deenergizes the solenoid I I6 to permit the spring II'I todisengage the clutch I05 as explained above.

The plate I! provided at the top of the frame I I forms a coverextending over a substantial portion of the mechanism and also providesa support for various parts of the apparatus. This plate also serves theimportant purpose of forming a worktable at the top of the machine forthe use of the operator and on which a number of the workpieces 2i canbe placed before and after the coils 25 and 26 have been wound thereon.The plate IT has an opening I35 therein located over the workholder I9and which is of a size and shape to permit the workholder to passtherethrough. When the workholder is at the uppermost point of itsreciprocating travel it extends above the plate I! and occupiessubstantially the position shown in Fig. '7 which represents the loadingand unloading station for the workholder. The opening I35 is here shownas being a generally circular opening, but has'substantially oppositelyextending extension recesses I35a which provide clearance for thelaterally projecting screws 44 of the side plates 33 and 34 of theworkholder.

The actuators 41 and 48, which have been referred to above in connectionwith the laterally movable fork members 39 and 40 of the workholder I9,are located above the plate I! for cooperation with the heads 39a and40a of these fork members when the workholder is at the loading andunloading station. The actuators 41 and 48 are mounted on the plate I1and, for this purpose, are provided with outwardly extending stem orshaft portions 41b and 48b which are slidable in bushings I35 carried bybearing blocks I 31 and I38. These bearing blocks can be substantiallyT-shaped as here shown and can be mounted on the plate I! by having thestem portions thereof extend downwardly through 11 openings I39 of theplate. The stems 41b and 48b of the actuators 41 and 48 are mounted inthe head portions of the bearing blocks which are located above theplate I1 and these stems'are provided with slots I46 in which the upperends of a pair of actuating levers MI and I42 engage.

The levers I 4| and I42 are themselves located in vertical slots I31aand I 38a of the bearing block I31 and I38 and are carried by forwardlyextending auxiliary shafts I43 and I44. These auxiliary shafts arerockably supported in part by the portions of the bearing blocks I31 andI38 which extend below the plate I1 and in part by a second pair ofbearing blocks M30: and MM which are mounted on the underside of theplate I1. The actuators 41 and 48 are normally urged toward each other,that is to say to an inwardly extended relation from the bearing blocksI31 and I38, by com ression springs I45 disposed around the stems 41band 485. When the actuators are in this extended relation they are inproper position for the dovetail slots 41a and 48a thereof to receivethe heads 39a and 49a of the fork members 39 and 40 when the workholdermoves upwardly to the loading and unloading station.

The outward movement of the actuators 41 and 49 for retracting the forkmembers 39 and 46 to release the workpiece 2| can be transmitted theretothrough the auxiliarly shafts I43, I44 and the levers I4I, I42 from anysuitable operating device. In this instance the machine I9 is providedwith a movable pedal I46 for this purpose which is ada ted to beactuated by a foot of the operator. The pedal I46 is mounted on pivotmeans I41 which is carried by a bracket extension I48 of theframe I Iand is operably connected wi h the auxiliarly shafts I43, I44 by leversI49, I59 mounted on the front ends of these shafts and links I5! and I52connecting the outer ends of these levers with the pedal.

When the pedal I46 is depressed by the foot of the operator, the leversMI and I42 will be swung in an outward direction relative to the openingI35 of the plate I1, thereby imparting a corresponding outward movementto the actuators 41 and 48 and to the fork members 39 and 46 connectedtherewith by the cooperating dovetail slot and head elements 41a, 39aand 48a, 40a. While the fork members are held in this retracted positionthe workpiece 2| having the coils 25 and 26 wound thereon is removedfrom the workholder I9 and another workpiece is substituted in itsplace. Release of the pedal I46 permits the springs I45 to impart inwardmovement of the actuators, thereby shifting the fork members 39 and 46inwardly to embrace the workpiece 2| and retain the same in position inthe workholder.

It will be understood that during the reciprocating movement imparted tothe workholder during the coil winding operation, the workholderrepeatedly moves into and out of the loading and unloading station andeach time that the workholder moves to this station the eating movementof the workholder I9 and the oscillating movement of the wire-feedingguide 20 take place alternately and each of these movements isinterrupted while the other is taking place. The occurrence of thesemovements in this sequential relation results from the provision oflost-motion operating connections in the mechanisms which impart thereciprocating and oscillating movements to the workholder and thewire-feeding guide, and which mechanisms have been described above. Aspointed out in the descriptions of these mechanisms, the link 11 has aslot 18a therein and the link 93 has a slot 94 therein. The cooperationof these slots with the pins 16 and 95 engaging therein forms thelost-motion connections just referred to. The pin 16 has a stem portionI54 which is mounted in fixed relation in the crank 15 (see Fig. 5) andthe pin carries a roller I55 which operates in the slot 18a. Similarly,the

7 pin 95 has a stem portion I56 which is mounted in fixed relation inthe gear sector H (see Fig.- 10) and the pin carries a roller I51 whichoperates in the slot 94.

The workholder I9 is shown in Fig. 6 at the lower end of itsreciprocating travel and is about to be moved upwardly by the gear 56.At this time the pin 16 of the crank 15 is at the lower end of the slot18a of the link 11. Since the" crank 15 rotates in a counter-clockwisedirec-- tion, as seen in Fig. 6, the pin 16 will immediately beefiective to exert a downwardpull on the link 11 to thereb impartclockwise arcuate movement to the gear 56 for lifting the workholder I9.By the time that the crank 15 has traveled through an angular distanceof approximately degrees the gear 56 will have lifted the Workholder I9to its uppermost position,.that is to say, to the loading and unloadingstation as shown in Fig. '7 and the pin 16 will then be at its lowerdead-center position.

Counter-clockwise rotation of the crank 15 thereafter takes place as anidle movement during which the pin 16 shifts upwardly in the slot 18awithout imparting axial movement to the link 11. When the pin 16 reachesthe upper end of the slot 18a it again imparts movement to the link 11,but in an upward direction which, causes counter-clockwise arcuatemovement of the gear 56 for moving the workholder downwardly. When thepin 16 passes over its upper dead-center position it again has an idletravel in the slot 18a which continues until the pin reaches the lowerend of the slot which is the position shown in Fig. 6. The idle travelof the pin 16 in the slot 18a at two points during each revolution ofthe crank 15 represents the two dwell periods during which thereciprocating movement of the workholder I9 is interrupted to permitoscillation of the wire-feeding guide 20 to take place.

Since the movement of the workholder I9 to the loading and unloadingstation at the upper end of its vertical travel is immediately followedby an idle downward movement of the pin 16 in the slot 18a, the link 11will be temporarily ineffective for holding the workholder in its upperposition. It is therefore necessary to pro-- vide means for temporarilyretaining the workholder in its upper position while this idle travel ofthe pin 16 is taking place. For this purpose the plate I1 is providedwith a spring pressed dete'nt or latch I58 and the gear 56 is providedwith a pair of spaced holding members I59 and 0, 01 e gagement with suchdetent. As shown r in Figs. 6 and 14 the holding members 159 and I60 arein the form of blocks adapted to be clamped in fixed relation on the'gear 56 by clamping stems I 59a and I60a extending'through arcuate slotsI6I and I62 of this gear. The block portion of each of these holdingmembers is provided with. a locking recess I63 adapted to P from thedetent and brings the holding member I60 into engagement with thedetent. The engagement of the holding member I60 with the detent I 58maintains the workholder at the loading and unloading station until theidle travel between the pin 16 and the slot 180. has taken place and thepin begins to impart an upward thrust to the link 11. Such upward thrustof the link imparts a counter-clockwisemovement to the gear 56 whichdisengages the holding member I60 from the detent and returns theholding member I59 into engagement with the detent. The arcuate slotsI6I and I62 of the gear 56 provide for adjustment of the relativepositions of the holding members'l59 and I60 so that the holdingfunction performed by the detent I58 as just explained above can besynchronized with respect to the movements of the other parts of themechanism.

In Figs. 3 and 6 the actuating mechanism for the workholder I9 is shownin the position at which the upward travel of the workholder is about tobegin. As previouslymentioned herein, the oscillating movement of thewire feeding guide is interrupted during the reciprocating travel of theworkholder. This is accomplished by the lost-motion connection formed bythe pin 95 and the above-mentioned slot 94 of the link 93. Fig. 9 showsthe position of the link 93, the crankpin 92 and the gear sector 1Icorresponding with the position shown in Figs. 3 and 6 for the link 11and the crankpin 16. For this position of the crankpin 92 and the link93, the pin 95 of the gear sector TI is at one end of the slot 94 andsince the crank 9I is being rotated in a counter-clockwise directionsimultaneously with the counter-clockwise rotation of the crank 15, thepin 95 is about to begin its idle travel along the slot 94.

For approximately 90 degrees of counter-clockwise rotation of the crank9I, as seen in Fig. 9,

the crankpin 92 will exert a pull on the link 93' but the slot 94prevents such pull from being applied to the pin 95 of the gear sectorII. During this 90 degree counter-clockwise idle rotation of the crank9| the crank 15 i exerting an efifective pull on the link 11, asexplained above, for lifting the workholder I9 through its upwardstroke. By the time that this upward stroke of the workholder iscompleted the lost-motion represented by the slot 94 will have beentaken up and the end of the slot 94 coming into engagement with the pin95 will then enable the crank 9| to impart swinging movement to the gearsector II. The outer end of the link 93 is preferably provided with anadjustable stop I65 which pin 95.

The counter-clockwise swinging movement thus imparted to the gear sectorII rotates the stem 52 of the wire-feeding guide 20 in a clockwisedirection causing the guide arms 51 and 58 to be swung about the path ofthe reciprocating movement of the workholder as an axis and through anarcuate path extending across the lower sides of the pole members 23 and24. Since the workholder at this time is in it upper position, that isat the loading and unloading station, this arcuate swinging movement ofthe arms 51 and 59 will take place in the clearance chamber 54 of theworkholder. This swinging of the guide arms 51 and 58 winds the wires 66and 6| across the lower side faces of the pole members 23 and 24 and atthe end of such swinging movement these guide arms will occupysubstantially the position shown in Figs. '7 and 11.

At the completion of this clockwise swinging of the guide arms 51 and 58the workholder I9 is moved back to its lower position shown in Fig. 6and while this is taking place another idle travel of the pin 95 in theslot 94 takes place which permits the wire-feeding guide 26 to remainstationary. Such downward movement of the workholder causes the guidearms 51 and 58 to pass relatively upwardly through the slots 22a of theframe opening 22 of the workpiece 2I thereby winding the wires 60 and BIupwardly around the hook portions of the pole members 23 and 24 and thusreturning the guide arms to their relative position above the workpiecein which they are shown in Fig. 6. In Figs. 7 and 11 the guide arms 51and 58 are shown in the position in which they are about to begin thisupward relative travel through the frame opening of the workpiece. Fromthe foregoing description of the alter- -nately interrupted sequentialreciprocating and oscillating movements of the workholder and thewire-feeding guide it will be seen that the guide arms 51 and 58accomplish what can be conveniently referred to as astep-by-steprelative movement around the respective pole members 23 and24 by which successive turns of the wires 1 60 and 6| are wrapped aroundthese pole memcap I66.

f a threaded projection I61 which is adapted to be screwed into athreaded portion provided at the upper end of the passage 59. Ifdesired, the

cap I66 can be provided with suitably located -holes I66a for theapplication of a spanner wrench, or the like thereto. This tapered capwill apply lateral thrust to turns of wire which overlap the frameopening 22 of the workpiece 2I .andwill tend to push these turns towardan outof-the-way position which will not interfere with the passage ofthe wire-feeding guide through the workpiece. As the result of thislateral pushing of the wire turns by the cap I66 the coils 25 ,v and 26may assume a partially curved or bowed ably supported on brackets I10and HI shape as shown in Fig. 16.

The wire strands 60 and GI for forming the coils 25 and 26 can besupplied to the wire-feeding guide 20 from suitably located spools I68and I69 carrying a supply of this wire. In this instance these spoolsare shown as being rotat- (see Fig. 1) projecting from the ends of theframe I I. In passing from the spools I68 and I69 to the awa e-79wire-feeding guide28, the strands 1.60 and 6'I extend around groovedrollers I12 and I13 of a pair of tension arms I14 and I15. The tensionarms I14 and I15 are pivotally mounted on the frame II by means ofbrackets I16 and I11 to which the arms are connected byspivot pins I18and I19. The wires 68 and 6! extend around-the rollers I12 and I18 insuch a direction as to apply a pull or lifting force to the tensionarms-I14 and I15. Tension springs I88 and NH exert a pull on the armsI14 and I15 in a downward direction so as to oppose such upward swingingof the arms and maintain the wires under tension. The upward swingingmovement of the tension arm I14 and I15 is limited by the inclined stopfaces I82 provided on these arms (see Fig. 4) and which are located soas to come into seating engagement with portions of the brackets I16 andI11.

The tension on the wires 68 and 6.I is also maintained, in part, byapplying a braking force or drag to the rollers I12 and I13 of thetension arms I14 and I15. This is accomplished by constructing therollers of relatively movable sections I82, I83 and I84, as shown inFig. 13, of which the sections I82 and I83 are end sections or diskswhich are held in non-rotatable relation and the section I84 is a centersection which is rotatable relative to these end sections by the actionof the Wire thereon. The end section I82 can be maintained stationary bybeing welded to the tension arm, as indicated at I 85, and the endsection I83 can be fixed on the shaft I86 by a key I83a which permitsthis section to be shifted axially of the shaft. The shaft I86 is heldagainst rotation in the tension arm by the pin I'86a. The center sectionI84 of the roller can be formed of wood, plastic or any other suitablematerial and has its side faces in frictional engagement with theadjacent faces of the end sections I82 and I83. A compression spring I81disposed around the shaft I86 acts to press the sections I82, I83 andI84 together so that rotation of the center section I84 by the wirepassing thereover will be resisted by the frictional drag providedbetween the center section and the end sections.

As shown in Fig. 13 of the drawings, the center section I84 may have aperipheral groove I88 extending therearound and forming a guide channelfor accommodating the wire. This guide channel is preferably lined witha relatively soft material I89 which will not scratch or mar theenamel-insulated surface of the wire, such as soft vulcanized rubber.Such a lining for the groove I88 can be formed by a piece of rubber tubesplit longitudinally so as to have a substantially semicircularcross-section. This transversely curved liner can be secured in theperipheral groove of the center section I 84 as by screws I98 extendingtherethrough into such center section. When the center section is madeof wood or other nonmetallic material, these screws can be wood screws,as shown in the drawings.

The operation of the improved coil winding machine I8 has already beenpartially explained herein but will be summarized in the followingparagraphs. To place the machine in readiness for performing the coilwinding operation, the operator presses the starting button I840. of themotor switch I84, thereby starting the driving motor 99 which thereafterruns continuously while the machine is being used. The operator alsoadjusts the revolution counter I38 by means of the adjusting knob I32 toset this device for the number -of "turns desired to be wound in the.coils 25 and .26. The operator then takes a posiztionfinfront .of themachine such that the pedal I 46 will be conveniently accessible to onefoot and the handwheel 88a and'the starting switch I33 will beconveniently accessible to one hand. Assuming that the workholder I9 isin its uppermost position, that is at the loading and unloading stationas shown in Fig. 1, the operator depresses the pedal I46, causing theactuators 41 and 48 to retract or expand the fork members 39 and 48 ofthe workholder. The operator thereupon inserts one of the frame members2| in the cavity of the workholder as a workpiece and releases the pedalI46, thereby allowing the fork members 39 and 48 to move inwardly intoembracing relation'with the workpiece and lock the same in position inthe cavity of the workholder.

Inthe event that the workholder I9 happens to be at a point belowthe'table I1 instead of at the loading and unloading station, theoperator manually rotates the handwheel 88a in a clockwise direction, asseen in Fig. 3, to actuate the gear -56 in 'a direction to lift theworkholder up tothe loading and unloading station. When this has beenaccomplished, the operator depresses the edal I46 to expand the forkmembers of the workholder to receive theworkpiece, as just explainedabove.

The leading ends of the wires 68 and 6|, which have been previouslythreaded through the stem 52 and the guide arms 51 .and 58 of theWirefeeding guide 28, are then applied to the anchor pins I9I and I92 ofthe workholder as shown in Figs. 6 and 11 preparatory to starting thewinding operation. The ends of the wires 68 and 6| can be simply loopedT01 bent-around the anchor pins and these portions -of the wires willsubsequently form one pair of leads for the coils such as the leads 25aand 26b. The operator then presses the starting switch I33 whichenergizes the revolution counter I38 causing the switch means of thelatter to become set and to also energize the solenoid "I I6. Theenergization of the solenoid I I-6 causes the clutch I to be engagedwhereupon the shaft I8 supplies motion to the mechanismswhichreciprocate the workholder I9 and oscillate the wire-feeding guide28 with the timed and sequentially interrupted'relative recipro'catingand relative oscillating movements explained above. These relativemovements cause the above-mentioned step-by-step progressive windingmovement of the guide arms 51 and 58 around the pole members 23 and 24to wind the turns of wire thereon to form the coils 25 and 26.

When the desired number of turns for which the counter I30 is set hasbeen wound on the pole members 23 and 24, the switch means of thecounter is automatically tripped and causes deenergization of thesolenoid I I6. The spring II1 thereupon causes disengagement of theclutch I 85 and stops the movement of the workholder I9 and of thewire-feeding guide 28. The disengagement of the clutch I85 isaccompanied by the above explained closing of the brake energizingswitch I2-I by the trigger I22 of the clutch control shaft II8, therebyrendering the electromagnetic brake I28 effective for a short intervalto stop the drive shaft I8 and the mechanisms which actuate theworkholder and the wire-feeding guide.

Usually the workholder will come to a stop at the loading and unloadingstation but if it comes to a stop a point below the table I1, theoperator rotates the handwheel 88a to drive the gear 56 17 in aclockwise direction to lift the workholder up to the loading andunloading station. The movement of the workholder up to the loading andunloading station causes the heads 39a and lila'of the fork members 39and 40.110 engage in the dovetail slots of theactuators 41 and 48, asexplained above. The operator then depresses the pedal I 46 to expandthe workholder and release the workpiece 2| on which the coils 25 and 26have just been wound. The operator grasps the workpiece and lifts thesame out of the cavity of the workholder and in so doing exerts anupward pull on the wires 60 and GI so as to withdraw an appropriateamount of wire out of the guide arms and 58. The operator then cuts thewires at a point near the coils and 26 so as to leave the leads 25b and26a projecting from the coils. The wire which has been withdrawn fromthe guide arms 51 and 58 also provides stock for attachment to the pinsNH and I92 of the workholder for starting the Winding operation on thenext workpiece to be inserted into the workholder. The above describedprocedure is repeated for the workpieces which are successively insertedinto and removed from the workholder.

From the foregoing description and the accompanying drawings it will nowbe readily understood that this invention provides an improved wire coilwinding machine by which electric coils can be wound on pole members ina more rapid and satisfactory manner than has heretofore been possible.It will now also be recognized that this invention provides a novelmachine by which field coils or the like can be rapidly andsatisfactorily wound on pole members projecting into an opening of amagnet frame.

Although the improved coil winding machine of the present invention hasbeen disclosed herein to a detailed extent it will be understood, ofcourse, that the invention is not to be regarded as being limitedcorrespondingly in scope, but includes all changes and modificationscoming within the terms of the claims hereof.

Having thus described our invention, we claim:

1. In a coil winding machine of the character described, a workholderfor supporting a substantially annular magnet frame of the type havingan opening therein and an isolated pole member projecting into saidopening, said workholder being reciprocably movable along a pathsubstantially coincident with the central axis of said opening, awire-feeding guide adapted to pass through said opening, said guidehaving a stem mounted for rocking movement substantially on said axisand an arm carried by said stem and adapted to be oscillatedtransverselyto said path by said rocking movement, said workholder being hollow atone end for receiving said magnet frame therein and at its other endhaving hollow bearing means slidable on said stem, a first means forimparting said re- 18 away from said loading and unloading station, afirst means for imparting such reciprocating movement to saidworkholder, an oscillatable wire-feeding means, a second means forimparting oscillating movement to said wire-feeding means, said firstmeans and said second means being effective to produce saidreciprocating movement of said workholder and said oscillating movementof said wire-feeding means alternately for causing the latter to windwire around said core member during said movements, and actuating meanson said supporting structure and located at said station and-beingoperable to cause relative opening of said sections for releasing thewound core member, said actuating means and one of the sections of saidworkholder having dovetail portions adapted for interfitting engagementupon movement of said workholder to said station.

3. In a coil winding machine, a supporting structure having a loadingand unloading station thereon, a workholder adapted to receive a coremember and having oppositely movable work retaining members, springmeans for urging said retaining members into holding cooperation withsaid core member, means mounting said workholder for back-and-forthmovement to and from said loading and unloading station, an oscillatablewire-feeding means in cooperating winding relation to said workholder,means operable to impart said back-and-forth movement to said workholderand an oscillating movement to said wire-feeding means alternately forcausing the latter to wind wire around said core member, dovetailelements connected with said retaining members, a pair of spacedactuating members on said supporting structure and located at saidstation, and complemental dovetail elements carried by said actuatingmembers and engageable with the first-mentioned dovetail elements uponmovement of said workholder to said station.

4. In a coil winding machine, a supporting structure having a loadingand unloading station thereon, a workholder adapted to receive a coremember and having oppositely movable work retaining members, springmeans for urging said retaining members into holding cooperation withsaid core member, means mounting said workholder for back-and-forthmovement to and from said loading and unloading station, an oscillatablewire-feeding means in cooperating winding relation to said workholder,means operable to impart said back-and-forth movement to said workholderand an oscillating movement to said wire-feeding means alternately forcausing the latter to wind wire around said core member, dovetailelements connected with said retaining members, a pair of spacedactuating members on said supporting structure and located at saidstation, complemental dovetail elements carried by said actuatingmembers and engageable with the first-mentioned dovetail elements uponmovement of said workholder to said station, and manually controlledmeans for causing operation of said actuating members.

5. In apparatus for winding wire on a core member, a workholder, meansmounting said workholder for back-and-forth movement, a wire-feedingdevice, means mounting said feedingdevice for oscillating movement intimed relation to the back-and-forth movement of said workholder forwinding the wire around said core member, a first means for impartingsaid oscillating movement to said feeding device, said workholder havingretaining means thereon which is relatively movable for retaining orreleasing said core member and spring means urging said retaining meanstoward its effective position, a loading and unloading station at oneend of the path of said back-and-forth movement, a second means formoving said workholder along said path and to said station, said firstmeans and said second means being effective for producing saidoscillating movement of said feeding device and said back-and-forthmovement of said workholder alternately, and actuating means located atsaid station and engageable with said retaining means, said actuatingmeans being effective to actuate said retaining means in opposition tosaid spring means only when said workholder is at said station.

6. In apparatus for winding wire on a core member, a frame, a workholderadapted to receive the core member and having retaining means forretaining the core member therein and said retaining means being movablefor releasing said core member, a table providing a work surface on saidframe and having an opening of a size and shape for the passage of saidworkholder therethrough, a loading and unloading station on said tableadjacent said opening, mechanism operable to cause wire to be wound intoa coil on said core member and to move said workholder through saidopening to said station, and actuatin means on said table adapted toactuate said retaining means for releasing said core member when theworkholder is at said station, said actuating means being movable in adirection extending transverse to the path of travel of said workholderand having a portion overhanging said opening for engagement with saidretaining means.

7. In apparatus for winding wire on a core member, a frame, a workholderadapted to receive said core member, means mounting said workholder onsaid frame for a substantially vertical reciprocating movement, awire-feeding device, means mounting said feeding device for oscillatingmovement in timed alternate relation and transversely to saidreciprocating movement for winding the wire around said core member,means for imparting said oscillating movement to said feeding device, atable providing a work surface on said frame and having an opening of asize and shape for passage of said workholder therethrough, a loadingand unloading station above said opening, means operable to impart saidreciprocating movement to said workholder and to move the same to saidstation, said workholder having retaining means thereon which is movableto release said core member, and actuating means on said table andadapted to actuate said retaining means when said workholder is at saidstation, said actuating means comprising a member movable in a directiontransverse to the path of travel of said workholder and overhanging saidopening and cooperating portions carried by said member and saidretaining means and forming a releasable operating connectiontherebetween when said workholder is at said station.

8. In apparatus for winding wire on a core member, a frame, a workholderadapted to receive said core member, means mounting said workholder onsaid frame for a substantially vertical reciprocating movement, awire-feeding device, means mounting said feeding device for oscillatingmovement in timed alternate relation and transversel to saidreciprocating movementv for winding the wire around said core member,means for imparting said oscillating movement to said feeding device, atable on said frame and having an opening of a size and shape forpassage of said workholder therethrough, a loading and unloading stationabove said opening, means operable to impart said reciprocating movementto said workholder and to move the same to said station, said workholderhaving fork members extending thereinto from opposite sides forretaining said core member therein and said fork members beingretractable for releasing the workpiece, and actuators mounted on saidtable and operable to retract said fork members when the workholder isat said station.

9. in a coil winding machine of the character described, a substantiallyvertically disposed hollow workholder adapted to support a substantiallyannular magnet frame of the type having an opening therein and anisolated pole member projecting into said opening, said workholder beingreciprocably movable along a vertical path substantially coincident withthe central vertical axis of the magnet frame opening, a wire-feedingguide adapted to pass through said magnet frame opening, said guidecomprising a substantially vertical hollow stem rockable onsaid axis andan arm carried by said stem and adapted to be oscillated therebytransversely to said path, means mounting said stem substantially onsaid vertical axis for such rocking movement, said workholder being openat its upper end for receiving a magnet frame therein and at its lowerend having hollow bearing means slidable on said stem, a first meansoperable to impart a lifting and lowering reciprocating movement to saidworkholder, and a second means operable to impart said rocking movementto said stem, said first means and said second means being effective toproduce said reciprocating and rocking movements alternately.

10. In a coil winding machine of the character described, asubstantially vertically disposed hollow workholder adapted to support asubstantially annular magnet frame of the type having an opening thereinand an isolated pole member project-ing into said opening, saidworkholder being recipro-cabl movable along a vertical pathsubstantially coincident with the central vertical axis of the magnetframe opening, a wire-feeding guide adapted to pass through said magnetframe opening, said guide comprising a substantially vertical hollowstem rockable on said axis and an arm carried by said stem and adaptedto be oscillated thereby transversely to said path, means mounting saidstem substantially on said vertical axis for such rocking movement, saidworkholder being open at its upper end for receiving a magnet frametherein and at its lower end having hollow bearing means slidable onsaid stem, a first means operable to impart a lifting and loweringreciprocating movement to said workholder and comprising a rackconnected with the workholder and a gear member meshing with said rack,and a second means operable to impart said rocking movement to saidstem, said first means and said second means being effective to producesaid reciprocating and rocking movements alternately.

11. In a coil winding machine of the character described, a workholderfor supporting a substantially annular magnet frame of the type hav ingan opening therein and a pair of isolated pole members projecting intosaid opening from opposite sides thereof, means mounting said workholderfor reciprocating movement along a path substantially coincident withthe central axis of said magnet frame opening, a wire-feeding guideadapted to pass through said opening, said guide having a stem mountedfOr rocking movement substantially on said axis and a pair of armsprojecting from opposite sides of said stem and adapted to be oscillatedtransversely to said path by said rocking movement, said stem and armshaving continuous guide passages therethrough for feeding wires from thearms for winding around said pole members, a first means for impartingsaid reciprocating movement to said workholder, and a second means forimparting said rocking movement to said stem, said first means and saidsecond means being efiective to produce said reciprocating and rockingmovements alternately, said guide having a convexly rounded axiallycoverging tapered and pointed end located on said stem in advance ofsaid arms and adapted to exert a spreading action on the turns of thecoils wound on said pole members.

JOHN B. LEECE. NATHAN P. HARMON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,370,744 Diehl Mar. 8, 19211,407,033 Huggins Feb. 21, 1922 1,503,254 Sippel et a1 July 29, 19241,977,828 Laib et a1. Oct. 23, 1934 2,197,117 Ammann et a1. Apr. 16,1940 2,275,995 Schneider Mar. 10, 1942 2,304,520 Wirtz et a1. Dec. 8,1942 2,339,589 Stearns Jan. 18, 1944 2,381,750 Hunsdorf Aug. 7, 19452,445,937 Carpenter July 27, 1948

